What is the maximum ADU size allowed in Signal Hill?

Detached ADUs in Signal Hill can be up to 1200 square feet.

ADU Builders & Contractors in Signal Hill, CA

Q: How much does it cost to build an ADU in Signal Hill?

The average cost ranges from $143,000 to $318,000, or $193-368 per square foot.

Q: How long does it take to get an ADU permit in Signal Hill?

The permit process typically takes 60 to 120 weeks in Signal Hill.

Signal Hill, CA is home to 57 ADU contractors ready to help. From initial permits to final inspection, these local professionals know Signal Hill's building codes and can guide your project from concept to completion.

📊 ADU Quick Facts for Signal Hill

Avg. Cost/sqft

$193-$368

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 57 ADU Contractors in Signal Hill

🏗️

#1CALIFORNIA COAST CONSTRUCTION

Signal Hill, CA

California Coast Construction — licensed ADU contractor in Signal Hill, CA. Detached ADU construction.

View Profile 📞 (310) 986 0589

🏗️

#2SIGNAL HILL BUILDERS

Signal Hill, CA

Signal Hill Builders — licensed ADU contractor in Signal Hill, CA. Detached ADU construction.

View Profile 📞 (714) 655 3951

🏗️

#3A1 BEST PLUMBING & RESTORATION

Signal Hill, CA

A1 Best Plumbing & Restoration — licensed ADU contractor in Signal Hill, CA. Detached ADU construction. 23+ years experience.

View Profile 📞 (562) 981 2636

🏗️

#4LOS ALTOS CONSTRUCTION INC

Signal Hill, CA

Los Altos Construction Inc — licensed ADU contractor in Signal Hill, CA. Detached ADU construction. 19+ years experience.

View Profile 📞 (562) 997 1220

🏗️

#5AMERICAN TILE AND BRICK VENEER INC

Signal Hill, CA

American Tile And Brick Veneer Inc — licensed ADU contractor in Signal Hill, CA. Detached ADU construction. 41+ years experience.

View Profile 📞 (562) 595 9293

🏗️

#6ASPHALT FABRIC AND ENGINEERING INC

Signal Hill, CA

Asphalt Fabric And Engineering Inc — licensed ADU contractor in Signal Hill, CA. Detached ADU construction. 27+ years experience.

View Profile 📞 (562) 997 4129

🏗️

#7RMS CONSTRUCTION

Signal Hill, CA

Rms Construction — licensed ADU contractor in Signal Hill, CA. Detached ADU construction. 18+ years experience.

View Profile 📞 (855) 760 1822

🏗️

#8REICK DEVELOPMENT

Signal Hill, CA

Reick Development — licensed ADU contractor in Signal Hill, CA. Detached ADU construction. 24+ years experience.

View Profile 📞 (562) 607 3809

🏗️

#9STREAMLINE BUILDING CORPORATION

Signal Hill, CA

Streamline Building Corporation — licensed ADU contractor in Signal Hill, CA. Detached ADU construction. 14+ years experience.

View Profile 📞 (562) 595 1600

🏗️

#10ENVIRONMENTAL CONSTRUCTION GROUP INC

Signal Hill, CA

Environmental Construction Group Inc — licensed ADU contractor in Signal Hill, CA. Detached ADU construction. 23+ years experience.

View Profile 📞 (562) 438 7999

View All 57 Contractors →

💰 How Much Does an ADU Cost in Signal Hill?

Garage Conversion

$66,500 - $126,500

Converting existing garage to living space

Detached ADU

$143,000 - $318,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,105 - $5,105

Plan check, permits, utility connections

* Costs vary based on size, finishes, site conditions, and contractor. Get quotes from multiple Signal Hill contractors to compare pricing.

❓ Frequently Asked Questions About ADUs in Signal Hill

How much does it cost to build an ADU in Signal Hill?▼

The average cost to build an ADU in Signal Hill ranges from $143,000 to $318,000, or approximately $193 to $368 per square foot. Garage conversions typically cost $66,500 to $126,500.

How long does it take to get an ADU permit in Signal Hill?▼

The ADU permit process in Signal Hill typically takes 60 to 120 weeks. California law requires cities to approve or deny ADU permits within 60 days of receiving a complete application.

What are the ADU size limits in Signal Hill?▼

In Signal Hill, detached ADUs can be up to 1200 square feet. Attached ADUs are limited to 50% of the primary dwelling or 1,200 sqft, whichever is less. Junior ADUs (JADUs) are limited to 500 sqft and must be within the existing home.

What is the setback requirement for ADUs in Signal Hill?▼

Signal Hill requires 4-foot setbacks from side property lines and 4-foot setbacks from rear property lines for new ADU construction. Converted structures (like existing garages) may maintain their current setbacks.

Do I need to provide parking for my ADU in Signal Hill?▼

No parking is required for ADUs in Signal Hill if your property is within half a mile of public transit, in a historic district, part of an existing multi-family building, or if the ADU is a garage conversion. Otherwise, one space may be required.

Also See ADU Contractors In

Los Angeles (3215)San Diego (2582)San Francisco (2170)Sacramento (1551)Riverside (925)Fresno (904)Anaheim (784)Irvine (760)

Ready to Build Your ADU in Signal Hill?

Get free quotes from top-rated local contractors

Find Contractors Now

← View all contractors in California